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annotate dsp/spec2fir.m @ 61:eff6bddf82e3 tip

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Finally implemented perceptual brightness thing.
author samer
date Sun, 11 Oct 2015 10:20:42 +0100
parents c3b0cd708782
children
rev   line source
samer@32 1 function R=spec2fir(A)
samer@32 2 % SPEC2FIR: convert magnitude spectra to FIR filter coefficients
samer@32 3 %
samer@32 4 % spec2fir :: [[M,L]] -> [[2*(M-1),L]].
samer@32 5
samer@32 6 n=size(A,1);
samer@32 7 S=[A; conj(A(n-1:-1:2,:))];
samer@32 8 R=fftshift(real(ifft(S)),1); % get filter coefficients
samer@32 9